body {
  overflow: hidden;
  margin: 0px;
  background-color: black;
}

#instructions {
  background-color: rgba(0, 0, 0, 0.5);
  top: 50%;
  left: 50%;
  height: 500px;
  width: 600px;
  margin-top: -250px;
  margin-left: -300px;
  position: absolute;
  font-size: 24px;
  font-family: monospace;
  color: white;
  text-align: center;
  pointer-events: none;
  user-select: none;
}

#instructions a {
  color: white;
  pointer-events: auto;
}

#instructions button {
  font-size: 24px;
  pointer-events: auto;
}

kbd {
  padding: 0px 4px;
  border: 1px solid rgb(255, 255, 255);
  border-radius: 4px;
  background: grey;
  font-size: 19px;
  color: white;
  font-family: monospace;
  font-style: normal;
}

#spinner {
  left: 50%;
  margin-left: -4em;
  font-size: 10px;
  border: 0.8em solid rgba(0, 0, 0, 1);
  border-left: 0.8em solid rgba(58, 166, 165, 1);
  animation: spin 1.1s infinite linear;
}
#spinner,
#spinner:after {
  border-radius: 50%;
  width: 8em;
  height: 8em;
  display: block;
  position: absolute;
  top: 50%;
  margin-top: -4.05em;
}

@keyframes spin {
  0% {
    transform: rotate(360deg);
  }
  100% {
    transform: rotate(0deg);
  }
}
